Matches 201 - 220 out of 220 < 1 2 3 4 5
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3609741 PREVENTION OF UNAUTHORIZED MOVEMENT OF ARTICLES BETWEEN PREDETERMINED AREAS  
A system for indicating an attempt to move an article, such as a piece of baggage or an article of merchandise, between predetermined areas, by providing a radio transmitter and radio receiver...
3587077 TELEMETRY SYSTEMS  
Telemetry equipment for use in an Audience Survey System for ascertaining at a central control the program channels to which wave signal receivers are tuned at a plurality of remote preselected...
3541513 COMMUNICATIONS CONTROL APPARATUS FOR SEQUENCING DIGITAL DATA AND ANALOG DATA FROM REMOTE STATIONS TO A CENTRAL DATA PROCESSOR  
3534337 DATA ACQUISITION DEVICE  
3516063 SUPERVISORY AND CONTROL SYSTEM HAVING BUFFER STORAGE INPUT TO DATA LOGGER  
3457550 AUTOMATIC HANDSHAKING METHOD AND APPARATUS FOR DATA TRANSMISSION SYSTEMS  
3435416 MONITORING AND CONTROL SYSTEM  
3428949 DISTRIBUTOR SYSTEM FOR MONITORING POSITION AND STATUS OF A NUMBER OF POINTS  
3381278 Data holding system  
3374486 Information retrieval system  
3344401 Inquiry system  
3283304 Data retrieval system  
3252132 Supervisory traffic control system  
3249919 Securities quotation apparatus  
3214734 Protection signalling system having channel impedance alteration means for providing indications of remote station conditions  
3098215 Data storage and transmission system  
3093795 Audience preference analysis system utilizing continuously interrogated responder staions  
3050712 Wired program distribution system  
3049706 Data exchange systems  
3040297 Supervisory control and remote metering  
Matches 201 - 220 out of 220 < 1 2 3 4 5